Face alignment via boosted ranking model

Face alignment seeks to deform a face model to match it with the features of the image of a face by optimizing an appropriate cost function. We propose a new face model that is aligned by maximizing a score function, which we learn from training data, and that we impose to be concave. We show that this problem can be reduced to learning a classifier that is able to say whether or not by switching from one alignment to a new one, the model is approaching the correct fitting. This relates to the ranking problem where a number of instances need to be ordered. For training the model, we propose to extend GentleBoost [23] to ranklearning. Extensive experimentation shows the superiority of this approach to other learning paradigms, and demonstrates that this model exceeds the alignment performance of the state-of-the-art.

• Type: Conference
• Year: 2008
• Where: CVPR
• Authors: Gianfranco Doretto, Hao Wu, Xiaoming Liu 0002
• Keywords: Alignment Performance, Appropriate Cost Function, Computer Vision, CVPR 2008, Face Alignment